Cupola-furnace.



PATENTED MAR, 12, 1907,

.13. D. MoGORMIGK.

GUPOLA FURNACE. APPLICATION FILED AUG.22{1905.

PATENT OFFICE.

BENJAMIN D. MCCORMICK, OF AKRON, OHIO.

CUPOLA-FURNACE.

Specification of Letters Patent.

Patented March 12, I907.

Application filed August 22,1905. Serial No. 275.282..

To a/ZZ whom it may concern:

Be it known that I, BENJAMIN D. MCCOR- MICK, a citizen of the UnitedStates of America, residing at Akron, in the county of Summit and Stateof Ohio, have invented new and useful Improvements in Cupola-Furnaccs,of which the following is a specification.

This invention relates to improvements in cupola-furnaces, andparticularly to a blast apparatus therefor, the object of the inventionbeing to provide a blast appliance wherein the air-chamber or wind-boxis disposed exteriorly of the furnace and above the point of inlet ofthe blast-pipe thereto to effectually prevent choking of saidair-chamber or wind-box by the entrance of slag thereto, and, further,toprovide a construction and arrangement of the blast-pipes to secure themost effective impingement of the blast upon the combustible materialwithin the furnace and 1 to permit of the ready and convenient removalof slag or other accumulation from the pipes when occasion requires.

The preferred embodiment of the invention is illustrated in theaccompanying drawing, in which Figure 1 is an elevational view of aconventionally-illustrated cupola-furnace having the invention appliedthereto, and Fig. 2 is a "central vertical section of the same.

Referring now more particularly to the drawing, the numeral 1 designatesthe furnace, upon the outer side of which is arranged an annularsurrounding blast-chamber or wind-box 2, communicating with blast-supplypipes 3, said chamber or structed of piping or any other preferred formor character of material.

Depending from the wind-box 2 are two sets of blast-pipes 4 and 5,arranged to discharge into the furnace at different elevations, thepipes 4 being disposed alternately in series with the pipes 5. Each pipe4 or 5 is substantially of elbow form, having upper and lower branches 6and 7, the former vertically disposed and communicating with the bottomof the wind-box 2 and the latter extending inwardly and downwardly at anoblique angle and projecting into the furnace through the wall thereofto project the air I downward upon the combustible material therein toapply the blast in the most effective manner. By arranging the two setsof pipes in alternate relation and to discharge l alternately atdifferent elevations the blast l is brought to bear at difierentelevations upon difierent portions of the charge, thereby l facilitatingthe melting process. It will be i observed that by this arrangement thewindl box is disposed above the level of the highest point at which theblast is delivered into the furnace, and that therefore the entrance ofslag into the box and choking of the same therefrom will be effectuallyprevented.

At the angle of intersection of its arms 6 and 7 and in line with thepassage in the latter each pipe 4 or 5 is formed with an opening 8,closed by a removable closure 9. Upon removing this closure a rod orother implement may be introduced into the branch 7 to remove any slagwhich may accumulate therein, thus enabling the pipes to be readily jand conveniently kept clear of any substance which will prevent freeinlet of the blast.

Having thus described the invention, what is claimed as new is I Incombination with a blast-furnace, a tubular duct surrounding the sameand constituting a blast-chamber, two sets or series of twyers connectedwith said duct and having downwardly and inw ardly inclinedinj ectorportions extended through the wall of the furnace and projecting beyondthe inner face of the latter for delivering the injected blast directlyinto the furnace charge, the injector box being conportions of one setof twyers being disposed I in a plane above and arranged at a differentinclination relative to the corresponding portions with the other set oftwyers and the two sets of injector portions being alterl nated inarrangement around the furnace, and means for supplying a blast fluidunder pressure to the blast-chamber.

In testimony whereof I aflix my signature in presence of two witnesses.

BENJAMIN D. MCCORMICK. Witnesses:

L. D. SEWARD,

l MARTHA SEWARD.

